Unlock instant, AI-driven research and patent intelligence for your innovation.

Hydraulic steering

a technology of hydraulic steering and steering linkage, applied in the direction of steering parts, steering linkages, mechanical steering, etc., can solve the problem of unjustifiable large efforts

Inactive Publication Date: 2007-11-01
SAUER DANFOSS NORDBERG
View PDF6 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention relates to a hydraulic steering system for vehicles that allows for a smooth and unnoticeable change in the steering when switching between pumps. The system uses a compensation valve to automatically adjust the pressure drop across the steering valve arrangement, ensuring that the driver does not feel any difference in the steering. This is achieved by connecting the steering valve arrangement to the first pump through a valve with pressure compensation function. The system also includes a second pump that can supply hydraulic fluid to the steering valve arrangement, ensuring that the driver does not feel any difference in the steering even if the first pump fails. The system is reliable and energy-efficient, and can be used in both trucks and self-propelled vehicles."

Problems solved by technology

An exactly simultaneous change-over, however, involves unjustifiably large efforts, so that the driver of a vehicle having such a steering will feel the change-over and in some cases be bothered by it.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hydraulic steering
  • Hydraulic steering
  • Hydraulic steering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] A hydraulic steering 1 shown in a schematic view in FIG. 1 comprises a steering motor arrangement 2 with a steering motor 3. The steering motor 3 is connected to a steering valve arrangement 4, in the embodiment shown having one single steering valve 5. The steering valve 5 is made as a slide valve.

[0029] The steering valve 5 is supplied with pressurised hydraulic fluid by a first pump 6. The first pump 6 is driven by a combustion engine, which also drives the vehicle provided with the steering 1. The first pump 6 is connected to a valve 8, here in the form of a priority valve. The valve 8 has a slide 9, which is acted upon in the opening direction by a spring 10. The opening direction is the direction, in which a passage between an inlet 11 of the valve and an outlet 12 of the valve 8 connected to the steering valve is further opened.

[0030] In the opposite direction, that is, in the closing direction, the slide 9 is acted upon by the pressure at the outlet 12 of the valve ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention concerns a hydraulic steering with a steering motor arrangement, a steering valve arrangement and a pressure supply comprising a first pump and a second pump. It is endeavoured to perform a change between the supplies by the pumps as unperceived as possible. For this purpose, the steering valve arrangement (4) is connected to the first pump (6) through a valve (8) with pressure compensation function and to the second pump (19) through a compensation valve (26).

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] Applicant hereby claims foreign priority benefits under U.S.C. § 119 from German Patent Application No. DE 10 2006 019 804.2 filed on Apr. 28, 2006, the contents of which are incorporated by reference herein. FIELD OF THE INVENTION [0002] The invention concerns a hydraulic steering with a steering motor arrangement, a steering valve arrangement and a pressure supply comprising a first pump and a second pump. BACKGROUND OF THE INVENTION [0003] Such a hydraulic steering is known from, for example, DE 101 59 297 A1. Each pump supplies its own steering valve, and each steering valve is connected to a steering motor. This provides two steering circuits. If an error occurs in one of the steering circuits, this steering circuit is deactivated and the other steering circuit is activated. For this purpose, it is necessary to change over a valve in each steering circuit. An exactly simultaneous change-over, however, involves unjustifiably large e...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B62D7/00
CPCB62D5/001B62D5/30B62D5/091B62D5/075
Inventor CLAUSEN, MARTIN
Owner SAUER DANFOSS NORDBERG